I have just replaced my spark plugs and air filter. It was easier than described, I didn't have to remove any other parts for the spark plug. I just used a long bent nose plier to pull the boots. And socket extensions with a joint to unscrew the spark plugs. But I found a hole in this hose. so i shorten it and connected it again using plastic ties. But what is this hose and what could have been the consequences driving with a hole in it. I did have a catalyst lower than threshold error. And I am trying to replace the plugs to fix it.
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